Gold is a metal that has only a small amount of real world use. Using it to back up a currency because it is rare is what has been done for ages and it’s really no better than buying into Bitcoin for the uninitiated.

“A new lithium ion battery will lose about 1.5-3.0% of its stored energy per month when new, and that accelerates as the battery gets older, toward the end of its life, where it will fail to hold even 50% of its nominal capacity overnight.”